Meaning of DR in Medicine

DR: Direct Digital Flat Panel X-ray Imaging System.

DR refers to a new technology of direct digital radiography under computer control, i.e. amorphous silicon flat panel detector is used to convert the X-ray information penetrating the human body into digital signals, and the computer reconstructs the image and carries out a series of image post-processing.

DR system mainly includes X-ray generator, direct conversion flat panel detector, system controller, image monitor, image processing workstation and other components.

DR adopts digital technology, so according to the clinical needs of a variety of image post-processing, such as automatic image processing technology, edge enhancement and clear technology, zoom roaming, image splicing, the interest area of the window width and window position adjustment, as well as the distance, area, density measurement and other rich functions.

In addition, due to the wide dynamic range of DR technology, the X-ray quantum detection efficiency (DQE) is high, and has a wide exposure latitude, even if the exposure conditions are a little poor, you can also get a very good image.

The emergence of DR breaks the concept of traditional X-ray images, realizing the transformation from analog X-ray images to digital X-ray images that people have been dreaming of, and it has a greater superiority compared with the CR (ComputerRadiography) system.

Expanded information:

DR features

(a), DQE, detection efficiency of up to 74%, the ordinary screen combination of X-ray photographs DQE for 30%.

(ii), DR imaging speed, acquisition time of 10ms or less, imaging time is only 3 seconds, diagnostic radiologist instantly observe the image on the screen. The image can be transmitted to the post-processing workstation in a few seconds for reading and sending diagnostic reports, and it takes about 5-10 minutes from the examination to the diagnostic report of the conventional chest DR photo.

(3), DR has a high spatial resolution and low noise rate, amorphous silicon X-ray irradiation is directly converted to electrical signals, to avoid other imaging modalities such as ordinary screen combination of photographs, CR, etc. light irradiation of phosphorus material caused by the scattering of the image sharpness is reduced, and therefore can be obtained from a high-definition image. And high performance MTF curve can be obtained.

(iv), digital images can be post-processed. Image post-processing is the biggest feature of digital images. Only after the original data to be retained, it can be based on diagnostic needs, and through the software function, targeted image processing, in order to improve the diagnostic rate.

The processing content of the window technology, parameter measurement, feature extraction, image recognition, two-dimensional or three-dimensional reconstruction, gray scale transformation, data compression, these are high-tech medical imaging in the field of the application of the important embodiment.

(5), DR has a low radiation dose. DR chest photo (adult), using 125KV, 320MA, 0.3MAS, distance 4500px photo conditions, the X-ray dose is only 0.20 roentgens, only for the ordinary screen combination of X-ray photo of X-ray dose of 1/53.3, is the X-ray dose of the CR photo of X-ray dose of 1/10, i.e., one screen The X-ray irradiation dose received by the combination X-ray chest photo is equivalent to the total X-ray dose of 53.3 times

DR photo, so the X-ray irradiation dose received by the DR photo is much lower than that of the radiation standard set by the CEC.

Reduces the adverse effects of X-ray exposure to the human body. DR photo is the best choice for X-ray examination, especially for children, teenagers and adults of childbearing age who are more sensitive to X-ray.

(vi), DR's direct conversion technology, make the network work simple and efficient, for medical imaging to realize the all-digital and filmless paved the way

(vii), an effective solution to the archive management and transmission of images, the use of CD-ROM burning form of preservation of image data, at any time for the examined person to provide photo printing services to prevent the photo is lost and repeat the photo, and high-resolution The high-definition DR photo is the photo image mutually recognized by all major hospitals in the region, so you don't have to repeat the examination at the higher level hospitals and reduce the expenses of repeated examinations.

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